/Engine/Source/Editor/SceneOutliner/Public/ActorBrowsingMode.h
Returns a unique folder path for a specific parent with a given leaf name (without creating it)
virtual [FFolder](API\Runtime\Engine\FFolder) GetFolder ( const [FFolder](API\Runtime\Engine\FFolder) & ParentPath, const [FName](API\Runtime\Core\UObject\FName) & LeafName )